Xml and databases

The perfect resource for beginning XML programmers, this guidebook clearly shows you what XML is, how to use it, and what technologies surround it. The authors build on the strengths of previous editions while covering the latest changes in the XML landscape such as XQuery, RSS and Atom, and Ajax. The most recent specifications are presented along with best practices to follow when developing XML solutions. The fourth edition will help you quickly progress from XML basics to more advanced programming techniques.

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Extensible Markup Language (XML) is based on simple, platform-independent rules for representing structured textual information. The platform-independent nature of XML makes it an ideal format for exchanging structured textual information among disparate applications. Therefore, at the heart of it, XML is about interoperability.

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This course will familiarize students with XML and teach them how to build web applications using XML. It teaches developers how to build a Web application that connects to and retrieves data from a database, displays the data by using XML, and saves updates from the client back to the database.

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Add seamless, interactive, user-controlled delivery to your Flash applications. This book builds upon your understanding of basic ActionScript (AS) syntax with the foundational skills that you need to use XML in Flash applications and AS2 or AS3 to migrate your existing applications. Beginning with an introduction to XML, XML parsing methods, and a short introduction to AS2 you learn how to create a universal XML load/onload Class as well as a universal XHTML parser. Then you learn how to use Components using XML as the data source, including the menu, menubar, datagrid and tree component.

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Planning and Organizing a Database Planning for your database is the first step in organizing and implementing a database system. First define how the database will be used. This determines what type of database you need to create that will meet the needs of your business, for example, data warehousing, high online transaction processing, or general purpose. After you determine the purpose and type, you must outline the database architecture that will be used.

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After completing this lesson, you should be able to do the following: Define the roles associated with the database tuning process Describe the dependencies between tuning in different development phases Describe service level agreements Identify tuning goals Identify common tuning problems Employ tuning activities during developmentand production Balance performance and safety trade-offs

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Before a database is created, the UNIX environment must be configured and the Oracle9i server must have already been installed. Four environment variables must be set: ORACLE_HOME, ORACLE_SID, PATH, LD_LIBRARY_PATH. ORACLE_HOME is the full path to the top directory in which the Oracle9i Server is installed. The directory for ORACLE_HOME should be supplied by the person who installed the server, usually the UNIX administrator or the DBA. ORACLE_SID is a user-definable name assigned to an instance of a database.

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After completing this lesson, you should be able to do the following: List the advantages of distributing different Oracle file types Diagnose tablespace usage problems List reasons for partitioning data in tablespaces Describe how checkpoints work Monitor and tune checkpoints Monitor and tune redo logs

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Built-In Database Objects In addition to creating the database files, several other structures are created. Data dictionary: Contains descriptions of the objects in the database Dynamic performance tables: Contains information used by the database administrator (DBA) to monitor and tune the database and instance PL/SQL packages: Program units adding functionality to the database. These packages are created when the catproc.sql script is run after the CREATE DATABASE command. PL/SQL packages will not be discussed within the scope of this course.

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Tablespaces and Data Files Databases, tablespaces, and data files are closely related, but they have important differences: An Oracle database consists of one or more logical storage units called tablespaces, which collectively store all of the database’s data. Each tablespace in an Oracle database consists of one or more files called data files, which are physical structures that conform with the operating system in which Oracle is running. A database’s data is collectively stored in the data files that constitute each tablespace of the database.

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After completing this lesson, you should be able to do the following: Describe the main database objects Create tables Describe the data types that can be used when specifying column definition Alter table definitions Drop, rename, and truncate tables

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Profiles A profile is a named set of the following password and resource limits: Password aging and expiration Password history Password complexity verification Account locking CPU time Input/output (I/O) operations Idle time Connect time Memory space (private SQL area for Shared Server only) Concurrent sessions After a profile has been created, the database administrator can assign it to each user. If resource limits are enabled, the Oracle server limits the database usage and resources to the defined profile of the user....

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Data Loading Methods Several methods are available for loading data into tables in an Oracle database. Of the methods available, Direct Load insert and SQL*Loader are discussed here. Export and Import are covered in the Oracle9i Database Administration Fundamentals II course. SQL*Loader SQL*Loader loads data from external files into tables of an Oracle database. It has a powerful data parsing engine that places little limitation on the format of the data in the data file. Direct Load Direct Load insert can be used to copy data from one table to another table within the same database.

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After completing this lesson, you should be able to do the following: Describe the features of multitable inserts Use the following types of multitable inserts Unconditional INSERT Pivoting INSERT Conditional ALL INSERT Conditional FIRST INSERT Create and use external tables Name the index at the time of creating a primary key constraint

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Character strings and date values are enclosed in single quotation marks. Character values are case sensitive, and date values are format sensitive. The default date format is DD-MON-RR.

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In this work, our objective is to give a survey on the classification of XML documents. As XML documents are basically text documents containing the content and structure information, they can be classified based on i) structure only and ii) a combination of both structure and content. This paper gives a brief survey based on this classification.

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In this paper we start with a brief summary of the existing approaches commonly used in heterogeneous database integration followed by a new and unique approach of integration of heterogeneous databases based on XML. Compared to conventional models, this model is simple, efficient and cost effective and hence can be widely used in businesses spread across multiple locations.

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Learn to access Oracle databases through SQL statements and construct PL/SQL programs with guidance from Oracle expert, Jason Price. Published by Oracle Press, Oracle Database 11g SQL explains how to retrieve and modify database information, use SQL Plus and SQL Developer, work with database objects, write PL/SQL programs, and much more. Inside, you'll find in-depth coverage of the very latest SQL features and tools, performance optimization techniques, advanced queries, Java support, and XML. This book contains everything you need to master SQL....

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JBuilder provides several features and incorporates various tools to provide support for the Extensible Markup Language (XML). XML is a platform-independent method of structuring information. Because XML separates the content of a document from the structure, it can be a useful means of exchanging data. For example, XML can be used to transfer data between databases and Java programs.

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Zend's new PHP 5 Certification Exam represent an excellent tool for professional PHP developers who want to distinguish themselves in their field. php|architect's Zend PHP 5 Certification Study Guide, edited and produced by the publishers of php|architect magazine, provides the most comprehensive and thorough preparation tool for developers who wish to take the exam.

290p fangfangfang 11-05-2012 177 71   Download